Their bottoms are in frequent contact with moisture, bacteria, and ammonia, and there is rubbing from the diaper. (stanfordchildrens.org)
Melting chocolate can be a difficult process as if it overheats (over 65 ⁰ C) or comes into contact with moisture the chocolate can «seize», forming an unusable, grainy - solid substance. (greatbritishchefs.com)
The argument begins by noting that the Clausius - Clapeyron equation, predicts a strong increase of boundary layer water vapor content with temperature (about 7 % per degree of warming); the increase of low level water vapor with temperature is not controversial, since oceanic boundary layers are in contact with their moisture source and stay rather near saturation. (realclimate.org)